Is there any chance the BATF could find the PTRD as "sporting" and exempt it from the NFA so it can be imported, it's 14.5 millimeter Russian (The Russian equivalent of .50 Bmg....), and bolt action, breach loading, single shot, and looks like piece of pipe with a pistol grip on it, no other "evil" features besides the grip except MAYBE a threaded barrel, I'm not sure so it would seem to pass the 1989 "sporting test", and there are certainly larger bore non-NFA guns out there like the .700 Nitros for example....
As for the rifle it's 78.74 inches long, yes you read that right 78.74 inches, the barrel is 53.15 inches long and it weighs 38.40 pounds fires a 986 grain bullet at 3,280 feet per second yes thats 986 grains at 3,280 feet per second, it was origionaly desighed as an anti-tank rifle ammunition is about $30 bucks a pop....